<template>
    <div
        ref="uploadImageRef"
        :class="{
            'x-upload--round': round,
            'x-upload--disabled': disabled,
        }"
        class="x-upload x-upload-image">
        <a-upload
            v-if="showUploadBtn"
            :accept="accept"
            :before-upload="onBeforeUpload"
            :custom-request="({ file }) => customRequest(file)"
            :disabled="disabled"
            :multiple="multiple"
            :show-upload-list="false">
            <slot>
                <div
                    :class="{
                        'x-upload-btn--hover': !disabled,
                    }"
                    :style="{
                        width: `${width}px`,
                        height: `${height}px`,
                    }"
                    class="x-upload-btn">
                    <div class="x-upload-btn__icon">
                        <slot name="icon">
                            <plus-outlined></plus-outlined>
                        </slot>
                    </div>
                    <div
                        v-if="text"
                        class="x-upload-btn__txt">
                        <slot name="text">
                            {{ text }}
                        </slot>
                    </div>
                </div>
            </slot>
        </a-upload>
        <div
            v-for="(item, index) in fileList"
            :key="item.key"
            :class="{
                'x-upload-item--error': STATUS_ENUM.is('error', item.status),
            }"
            :style="{
                width: `${width}px`,
                height: `${height}px`,
            }"
            class="x-upload-item j-upload-item">
            <img
                :src="item.src"
                alt="" />
            <template v-if="['error', 'done'].includes(STATUS_ENUM.getKey(item.status))">
                <div class="x-upload-actions">
                    <div
                        v-if="STATUS_ENUM.is('done', item.status)"
                        class="x-upload-action"
                        @click="handlePreview(item, index)">
                        <eye-outlined />
                    </div>
                    <div
                        v-if="!disabled"
                        class="x-upload-action"
                        @click="handleRemove(index)">
                        <delete-outlined />
                    </div>
                </div>
            </template>
            <template v-else>
                <div class="x-upload-status">
                    <template v-if="STATUS_ENUM.is('uploading', item.status)">
                        <div>{{ item.percent }}%</div>
                        <a-progress
                            :percent="item.percent"
                            :show-info="false"
                            :stroke-width="4" />
                    </template>
                    <template v-if="STATUS_ENUM.is('wait', item.status)">
                        <div>{{ STATUS_ENUM.getDesc(item.status) }}</div>
                        <span
                            class="x-upload-action"
                            @click="handleCancel(item)">
                            取消上传
                        </span>
                    </template>
                </div>
            </template>
        </div>
    </div>

    <!--裁剪-->
    <cropper-dialog
        v-if="cropper && !multiple"
        ref="cropperDialogRef"
        @ok="(_, { file }) => customRequest(file)" />
</template>

<script setup>
import { Form, message } from 'ant-design-vue'
import { filesize } from 'filesize'
import filesizeParser from 'filesize-parser'
import { findIndex, includes, some } from 'lodash-es'
import { nanoid } from 'nanoid'
import Sortable from 'sortablejs'
import { computed, onMounted, ref, watch } from 'vue'
import { DeleteOutlined, EyeOutlined, PlusOutlined } from '@ant-design/icons-vue'
import { deepMerge } from '@/utils'
import CropperDialog from '../Cropper/CropperDialog.vue'
import { Preview } from '../Preview'
import { STATUS_ENUM } from './config'

defineOptions({
    name: 'XUploadImage',
})
/**
 * 图片上传
 * @property {string | array} modelValue v-model
 * @property {boolean} multiple 批量上传，默认：false
 * @property {number} width 宽，默认：120，单位：px
 * @property {number} height 高，默认：120，单位：px
 * @property {string} text 文案
 * @property {string | number} maxSize 最大限制，默认：2M
 * @property {string} accept 允许上传文件类型，默认：image/*
 * @property {boolean} disabled 禁用，默认：false
 * @property {boolean} round 圆角
 * @property {boolean} cropper 裁剪，仅支持单文件上传，默认：false，
 * @property {number} aspectRatio 比例，默认：自由裁剪
 * @property {number} quality 图片质量，取值范围：0-1，默认：1
 * @property {boolean} dragSort 拖拽排序，默认：false
 */
const props = defineProps({
    modelValue: {
        type: [String, Array],
        default: '',
    },
    multiple: {
        type: Boolean,
        default: false,
    },
    width: {
        type: Number,
        default: 120,
    },
    height: {
        type: Number,
        default: 120,
    },
    text: {
        type: String,
        default: '',
    },
    maxSize: {
        type: [String, Number],
        default: '2M',
    },
    accept: {
        type: String,
        default: 'image/*',
    },
    disabled: {
        type: Boolean,
        default: false,
    },
    round: {
        type: Boolean,
        default: false,
    },
    cropper: {
        type: Boolean,
        default: false,
    },
    aspectRatio: {
        type: Number,
        default: 0,
    },
    quality: {
        type: Number,
        default: 1,
    },
    draggable: {
        type: Boolean,
        default: false,
    },
})

const emits = defineEmits(['update:modelValue', 'change'])

const { onFieldChange } = Form.useInjectFormItemContext()

const fileList = ref([])
const cropperDialogRef = ref()
const uploadImageRef = ref()
const sortable = ref(null)

const loading = computed(() => fileList.value.some((o) => STATUS_ENUM.is('uploading', o.status)))
const showUploadBtn = computed(() => props.multiple || !fileList.value.length)
const dragSortDisabled = computed(() => !(props.draggable && !props.disabled))

watch(
    () => props.modelValue,
    () => {
        init()
    }
)

watch(
    () => dragSortDisabled.value,
    () => {
        initDragSort()
    }
)

onMounted(() => {
    init()
    initDragSort()
})

/**
 * 初始化
 */
function init() {
    const currentValue = props.modelValue
        ? props.modelValue instanceof Array
            ? props.modelValue
            : [props.modelValue]
        : []
    if (currentValue.length) {
        // 移除不存在的文件
        fileList.value.forEach((item, index) => {
            // 已完成 && 不存在与 modelValue 中
            if (STATUS_ENUM.is('done', item.status) && !includes(currentValue, item.src)) {
                fileList.value.splice(index, 1)
            }
        })
        // 添加不存在与 modelValue 中的文件
        currentValue.forEach((item) => {
            if (!some(fileList.value, { src: item })) {
                fileList.value.push(getItem({ src: item }))
            }
        })
    } else {
        fileList.value = []
    }
}

/**
 * 初始化拖拽排序
 */
function initDragSort() {
    if (sortable.value) {
        sortable.value.destroy()
        sortable.value = null
    }
    sortable.value = Sortable.create(uploadImageRef.value, {
        handle: '.j-upload-item',
        animation: 200,
        disabled: dragSortDisabled.value,
        onEnd: ({ newIndex, oldIndex }) => {
            const dragData = fileList.value.splice(oldIndex - 1, 1)[0]
            fileList.value.splice(newIndex - 1, 0, dragData)
            trigger()
        },
    })
}

/**
 * 预览
 * @param {*} record
 * @param {number} index 索引
 */
function handlePreview(record, index) {
    if (props.multiple) {
        // 多选
        Preview({
            urls: props.modelValue,
            current: index,
        })
    } else {
        // 单选
        Preview(record.src)
    }
}

/**
 * 移除
 * @param index
 */
function handleRemove(index) {
    fileList.value.splice(index, 1)
    trigger()
}

/**
 * 取消上传
 */
function handleCancel({ key }) {
    const index = fileList.value.findIndex((o) => o.key === key)
    fileList.value.splice(index, 1)
}

/**
 * 上传前
 */
function onBeforeUpload(file) {
    const maxFileSize = props.maxSize instanceof Number ? props.maxSize : filesizeParser(props.maxSize)
    const checkFileSize = file?.size < maxFileSize
    if (!checkFileSize) {
        message.warning(`已忽略超过 ${filesize(maxFileSize)} 的文件`)
    }
    const checkCropper = props.cropper ? props.multiple : true
    if (props.cropper && !props.multiple) {
        const fileReader = new FileReader()
        fileReader.readAsDataURL(file)
        fileReader.onload = (e) => {
            cropperDialogRef.value?.open({
                src: e.target.result,
                quality: props.quality,
                aspectRatio: props.aspectRatio,
            })
        }
    }
    return checkFileSize && checkCropper
}

/**
 * 拖拽结束
 */
// function onDragEnd() {
//     trigger()
// }

/**
 * 自定义上传
 */
function customRequest(file) {
    const record = getItem({
        key: file.uid,
        src: URL.createObjectURL(file),
        status: STATUS_ENUM.getValue('wait'),
        percent: 0,
        file,
    })
    // 判断是否批量上传
    if (props.multiple) {
        // 批量上传
        fileList.value.push(record)
    } else {
        // 单文件上传
        fileList.value = [record]
    }
    if (!loading.value) {
        doUpload()
    }
}

/**
 * 执行上传
 */
async function doUpload() {
    // 判断是否还有待上传文件
    if (!some(fileList.value, { status: STATUS_ENUM.getValue('wait') })) {
        return
    }
    const index = findIndex(fileList.value, { status: STATUS_ENUM.getValue('wait') })
    const record = fileList.value[index]
    record.status = STATUS_ENUM.getValue('uploading')

    // 模拟示例
    record.percent = 100
    record.status = STATUS_ENUM.getValue('done')
    trigger()
    await doUpload()

    // 接口示例
    // const { code } = await apis.common.upload({
    //     file: record?.file,
    // })
    // if (config('http.code.success') === code) {
    //     // 上传进度
    //     record.percent = 100
    //     // 上传状态，根据实际情况更新
    //     record.status = STATUS_ENUM.getValue('done')
    //     // 更新文件 url
    //     record.src = data?.src
    //     // 触发事件
    //     trigger()
    //     // 递归上传，检查是否还有未上传的文件
    //     await doUpload()
    // }
}

/**
 * 基础结构
 * @return {{}}
 */
function getItem(obj) {
    return deepMerge(
        {
            key: nanoid(),
            src: '',
            status: STATUS_ENUM.getValue('done'),
            percent: 100,
        },
        obj
    )
}

/**
 * 触发
 */
function trigger() {
    let value
    // 判断是否多选
    if (props.multiple) {
        // 多选
        value = fileList.value.filter((item) => STATUS_ENUM.is('done', item.status)).map((item) => item?.src ?? item)
    } else {
        // 单选
        value = (fileList.value.length ? fileList.value[0]?.src : fileList.value[0]) ?? ''
    }
    emits('update:modelValue', value)
    emits('change', value)
    onFieldChange()
}
</script>

<style lang="less" scoped>
.x-upload {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;

    // 圆角
    &--round {
        .x-upload-btn,
        .x-upload-item {
            border-radius: 10em;
        }
    }

    // 禁用
    &--disabled {
        .x-upload-btn {
            opacity: 0.5;
            cursor: not-allowed;
        }
    }

    &-btn {
        border: @color-border dashed 1px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.2s;
        border-radius: @border-radius;

        &--hover {
            &:hover {
                border-color: @color-primary;
                color: @color-primary;
            }
        }

        &__icon {
            font-size: 20px;
        }

        &__txt {
            margin: 8px 0 0;
        }
    }

    &-item {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: hsv(0, 0, 96%);
        border-radius: @border-radius;

        img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        &:hover {
            .x-upload-actions {
                opacity: 1;
            }
        }

        &--error {
            &::before {
                position: absolute;
                content: '';
                width: 100%;
                height: 100%;
                border: @color-error dashed 1px;
                z-index: 2;
                pointer-events: none;
            }
        }
    }

    &-actions {
        position: absolute;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 4px;
        width: 100%;
        height: 100%;
        left: 0;
        top: 0;
        background: rgba(0, 0, 0, 0.25);
        opacity: 0;
        transition: all 0.15s;
    }

    &-action {
        min-width: 24px;
        height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        border-radius: 2px;
        cursor: pointer;
        background: rgba(0, 0, 0, 0.25);
        transition: all 0.15s;
        font-size: 12px;
        padding: 0 4px;

        &:hover {
            background: rgba(0, 0, 0, 0.5);
        }
    }

    &-status {
        position: absolute;
        width: 100%;
        height: 100%;
        left: 0;
        top: 0;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        background: rgba(0, 0, 0, 0.25);
        padding: 0 16px;
        color: #fff;

        &--error {
            color: @color-error;
        }

        &--done {
            color: @color-success;
        }
    }
}
</style>
